Marie Ballif, University of Bern (IMAGE) University of Bern Caption Marie Ballif, Ph.D., ISPM, University of Bern. Credit Courtesy of Marie Ballif Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.